/Engine/Source/Runtime/UMG/Public/Slate/SMeshWidget.h
Whenever possible, LeafWidgets should avoid dealing with layout properties. See TextBlock for an example.
virtual int32 OnPaint ( const [FPaintArgs](API\Runtime\SlateCore\Types\FPaintArgs) & Args, const [FGeometry](API\Runtime\SlateCore\Layout\FGeometry) & AllottedGeometry, const [FSlateRect](API\Runtime\SlateCore\Layout\FSlateRect) & MyCullingRect, [FSlateWindowElementList](API\Runtime\SlateCore\Rendering\FSlateWindowElementList) & OutDrawElements, int32 LayerId, const [FWidgetStyle](API\Runtime\SlateCore\Styling\FWidgetStyle) & InWidgetStyle, bool bParentEnabled ) const